this was one of the reasons i enjoyed flying vueling and flew them over ryanair on some routes... i know that oftentimes they dont fly to the exact same airports, but i would pay the extra to not pay for luggage and fly out of CDG as opposed to BVA for example.

I don't like it. It's a way to advertise lower fares because this is essentially a hidden charge. It is very arbitrary, one person weighs 50 kg and another person weighs 90 kgs. They pay the same for a ticket. The person who weighs 50 kgs has luggage that is 10 kgs. The person weighing 90 kgs has no luggage.

Transporting the 60 kgs will be more expensive than the 90 kgs.

Makes no sense whatsoever.

Not to mention that the charge is 8 euros or so for the first 20 kgs of luggage, but the 21st kg will cost 8 euros additionally.

How can the first 20 kgs be so cheap, and the 21st so expensive?

Because it is all arbitrary. In fact all pax pay for their average weight (70-75kg) + 20 kg luggage + 5 kg hand-luggage already with their ticket. Then there is an extra 'surcharge' for baggage already paid for.

It is only when the pax takes that 21st kg with him/her that you pay per kg.

I prefer to fly with an airline that has no hidden charges and doesn't treat their customers like utter fools. I choose companies that have no hidden charges and treat their customers as utter fools

Well, that's the way they want to picture themselves. In fact, in a TV interview to one of their former managers (JM Abad) he said they were not using the LCC formula because they were not a LCC, but a "new generation airline", as they were offering services that LCC's did not at the time (web check-in, mainhub airports, seat selection, easy ticket changes, magazines on board, leather seats (literally)..., etc

It is clear now that no matter how they want to regard themselves, the way they are taking is the LCC one. Maybe the new management has had something to do in this.

It's sad because once again it shows that being creative in this business does not pay off